Bone recovering surgical drill comprising a stop having a colored mark

ABSTRACT

The invention relates to a bone recovering surgical drill comprising an active portion (A) and a non-active portion (E), having between the active and non-active portions one or more circular grooves (f) the depth and width of which are sufficient for recovering the drilled bone residues, as well as a stop with a diameter larger than that of the active portion (A), the purpose of which is to limit the penetration of the drill. The stop is a fixed stop with a coloured mark (d) on said stop.

BACKGROUND OF THE INVENTION

The present invention relates to a bone recovering surgical drill, witha stop to limit its penetration, having one or more deep circulargrooves between the active portion of the drill and the stop to retainthe drilled bone residues, according to the preamble of claim 1.

SUMMARY OF THE INVENTION

Such a drill is known from document U.S. Pat. No. 4,710,075. The presentinvention provides a drill additionally comprising the characteristicscontained in the second part of claim 1. In the dependent claims,particular embodiments are indicated.

Said bone can, in a second stage, be recovered for the purposes of bonegrafts.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

FIG. 1 is a fragmentary elevational view illustrating the bonerecovering surgical drill according to the present invention; and

FIG. 2 is a fragmentary elevational view further illustrating the bonerecovering surgical drill according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The bone recovering surgical drill has, or can have, five specificfeatures:

a) a fixed stop (B) having a diameter which is larger than that of theactive portion, serving to limit the penetration of the drill, andserving as a cover for the bone recovery area;

b) a coloured mark (d) extending over the stop to enable the distancebetween the tip of the drill and the stop to be determined;

c) a mark (e) on the smooth, non-active portion (E) of the drill toenable the diameter of the drill to be determined;

d) one or more circular spaces (f) between the tip of the drill and thestop, the role of which is to recover the drilled bone residues;this/these space(s) can be 1 to several mm wide, and said circulargroove(s) must have a depth of 1 to several mm, depending on thestrength of the drill; and

e) the active portion (A) ends with an angle (h) of more than 90° tofacilitate the withdrawal of the spinning instrument.

What is claimed is:
 1. Bone recovering surgical drill comprising anactive portion (A) and a non-active portion (E), having between theactive and non-active portions one or more circular grooves wherein thedrill comprises at least one groove (f), the depth and width of whichare sufficient for recovering the drilled bone residues, as well as astop with a diameter larger than that of the active portion (A), thepurpose of which is to limit the penetration of the drill, the stopbeing a fixed stop with a coloured mark (d).
 2. Bone recovering surgicaldrill according to claim 1, characterised in that the circular groove orgrooves (f) is/are 1 to several mm deep and 1 to several mm wide. 3.Bone recovering surgical drill according to claim 1, characterised inthat the drill has, on its non-active portion (E) a mark (e) indicatingthe diameter of the drill.